I was making a project out of skid wood. I did play with the sensitivity setting but getting inconsistent results. I randomly shot 23 ga. pins, 16 ga. brads into the top and sides of a 2x4 at different depths to try and set it. Still could not set it to pick up most of them.
I may have just had a bad unit. I ended up using epoxy to attach a rare earth magnet on a 12" 1/4" square dowel. Balance it on my finger and run it around the wood (both sides). Worked good but VERY slow.
I may give one another try in the future.